Bolt-operating and automatic locking mechanism.



R L K I B M .J

BOLT OPERATING AND AUTOMATIC LOCKING MECHANISM.

APPLICATION FILED JUNE 27, 1907.

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PATENTED JUNE 2 1908.

v J. MEIKLI-L- BOLT OPERATING AND AUTOMATIC LOOKING MEGHANISM.

APPLIOATION FILED JUNE 27, 1907.

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.IOHN MEIKLE, OF WILKINSBURG, PENNSYLVANIA.

BOLT-OPERATING AND' AUTOMATIC LOCKING MECHANISM.

Specification of Letters Patent.

Patented June 2, 19 08.

Application filed June 27, 1907. Serial No. 381,168.

' To all whom it may concern:

. Be it known that 1, JOHN MEIKLE, a sub- -ject of Great Britain,residing at Wilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in aBolt-Operating and Automatic Locking Mechanism; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to .7 which it appertainsto make and use the same.

This invention relates to improved means for throwing a bar, rod or boltback and forth and for automatically locking it in either of its extremepositions.

The object of the invention is to provide a simple, cheap and easilyassembled mechan-' ism for longitudinally moving a bar, bolt or rod backand forth and for automatically looking it in its extreme positions andwhich is adapted for application to a variety of purposes such as theoperation of a railway signal switch, for operating a clutch to throw abelt from a fixed to a loose pulley and vice I versa or for an emergencyor other brake.

The invention consists of three essential or main members-a guidemember, an operating member and an operated member.

In the accompanying drawings, Figure 1 L represents a front elevation ofthe device applied with the bolt in its unlocked position; F i 2represents a similar View showing the b0 t in locked position; Fig. 3represents a cross section taken on the line 33 of Fig.

. 2; Fig. 4 represents a perspective View of the casing taken from therear thereof; Fig. 5 represents a perspective view of the bolt; Fig. 6represents a similar view of the operating member; Fig. 7 represents afront elevation of a modified form showing the bolt in its unlockedposition in full lines and in its locked position in dotted lines. Fig.8 represents a similar view showing the casing removed; Fig. 9represents a perspective View of the casing looking at it from the rearor inside; Fig. 10 represents a perspective view of the bolt; Fig. 11represents a perspective view of the operating member; Fig. 12represents a perspective view a slightly modified form of bolt; Fig. 13represents a perspective view of the operating member for use in connection with the bolt shown in Fig. 12.

The invention is herein shown and described as applied to a door-bolt orlatch of a horizontal type. In the form illustrated in Figs. 1 to 6, aguide member or casing 1 is shown open at both ends and compose of aplate having depending flanges 2 and 3 at its opposite sides which areprovided with laterally-extending apertured attaching lugs as 4. Theside flanges 2 and 3 are preferably flared outwardly to prevent bindingof the bolt there between. This casing is provided in its face or topwith two slots 5 and 6 which are arranged substantially horizontal orinclined downwardly towards each other and provided at their outer endsin their lower edges with notches or slots 7 and 8 communicating withthe slots 5 and 6. In the flange 2 of the casing is a cutout portion orrecess 9 for a purpose hereinafter described. Mounted to J slide in thecasin 1 is a bolt 10 having a recess 11 formed ongitudinally therein andhaving a recess or notch 12 in its upper edge communicating with therecess 11 for a purpose to be described.

An operating member in the form of a T- shaped cam lever 13 is disposedin the recess 11 of the operated member or bolt 10 with its stem 14projecting through the notch 12 in the bolt 10 and the recess 9 in thecasing 1 and is provided with a finger piece 15. On one face of the headof the'cam member 13 are two laterally-projecting spaced studs 16 and 17which are adapted to project through theslots 5 and 6 in the casing 1when the parts are assembled. The head of the cam member 13 ispreferably made of a length to correspond with the length of the recess11 in the bolt 10 or slightly shorter than said recess and the oppositeedges thereof are curved longitudinally, as shown in the drawings withtheir side edges preferably beveled as shown at 18 to facilitate theoperation of the member 13 without binding. In the use of this form ofthe invention, the cam member 13 is placed in the recess 11 of the bolt10 with the studs 16 and 17 projecting outwardly and the casing 1 isplaced thereover with the studs extending through slots 5 and 6 thereinand with the stem 14 extending through the recesses 12 and 9. The casingis then fastened to a door or other object by means of screws which arepassed through the apertures in the laterally extendin lugs 4.. Spacingplates as 19 are preferabIy arranged between the casin and the door toprevent the sliding of the olt from marring the surface of the door. InFig. 2, the bolt is shown in one of its extreme positions locked by thestud 16 which engages the notch 7 of the slot 5 and holds said boltlocked until said stud is raised out of the notch 7 into the slot 5 withwhich it communicates. With the stud 17 as a fulcrum, the actuating armor stem 14 of the cam at the first impulse of the finger tip rocks themember 13 and raises the stud 16 out of the notch 7 into the slot 5where it is free to move until both studs 16 and 17 with the attachedcam head or cross-bar 13 are moved to the other extremity where the pin17 drops into the notch 8 at the end of the slot 6, the stud 16 may thenused as a fulcrum. The dropping of the studs into the notches at theopposite ends of the slots, locks the bolt in either of its extremepositions and holds it against accidental or fraudulent operation.

The two forms shown in Figs. 7 to 12 are very similar and are adaptedfor use in the reverse position to that shown in Figs. 1 to 6 with theoperating finger piece or actuating arm projecting downward. The casing20 is similar to the casing 1 except that it has a recess 21 in itslower instead of in its upper edge to permit the passage of theactuating arm and is provided on its inner face with spacedlaterally-projecting studs 22 and 23 for engagement with notches in theoperating member, as hereinafter described. The operated member or bolt24 is similar to the bolt 10 except that it has a recess or notch 25 inits lower instead of in its upper edge. The operating cam member 26 hasits upper edge curved longitudinally and its lower edge inclinedupwardly toward the stem 27 an provided with notches 28 and 29 adjacentsaid stem and at its outer ends with notches 30 and 31 arranged at rightangles to the notches 28 and 29. These notches 28 and 29 and 30 and 31are adapted to engage the studs 22 and 23 on the casing 20 for operatingand looking the bolt, as described in the operation of the invention,shown in Figs. 1 to 6. The contour of the under side of the cam 26corresponds to the shape of the slots 5 and 6 in Fig. 1 and in theabsence of the other side of the guiding slots, the curved upper surfaceof the cam 26 rocks on the side Wall of the recess in the bolt 20.

The form shown in Figs. 12 and 13 differs slightly from that shown inFigs. 7 to 11, the casing being of the same construction and the boltbeing also similar except that it has a transversely-extending slot 32inthe wall of its cam holding recess similar to the slot 10 shown in Figs.1, 2 and 5 and the cam member 35 is the same as that shown in Fig. 7,except that it has a laterally-projecting stud 36 on its inner face foroperation in the slot 32 in the bolt similar to the stud 13 shown inFigs. 1, 2 and 6. These studs and slots are designed to prevent lostmotion.

In the operation of the device shown in Figs. 7 to 13 in which theactuating arm, of the operating member projects downwardly touch withthe'ends of the recesses in the 'bolt, or pin 36 shownin Fig. 13, whichengages the elongated hole orslot in the rear wall of the recess in saidbolt, carries the bolt to and fro as desired.

I claim as my invention,

1. The combination of a fixed plate provided with a guide, an operatedmember provided with means for receiving a thrust longitudinally, and aT-shaped cam provided with means for engaging the guide on said plateand operable by a single thrust in the direction of movement of theoperated mem ber to unlock, move longitudinally, and lock said operatedmember.

2. The combination of a member provided with guiding means, an operatedmember movable longitudinally relatively to said guide carrying memberand having a recess in one side thereof, an operating member looselydisposed in the recess ofsaid oper- .ated member and movableindependently relatively thereto, and means carried by said operatingmember for engagement with said guiding means for moving said operatedmember longitudinally and locking it in one of its extreme positions.

' 3. The combination of a casing provided with guiding means having arecess extending longitudinally thereof, a bolt slidable in said casingand having a recess in one side thereof, and a notch in one wall of saidrecess registering with the recess in said casing, a T-shaped operatingmember, arranged in the recess in said bolt with its stem projectedthrough the notch in the bolt and the recess in the casing, and providedwith a finger piece, and means carried by said operating member forengagement with said guiding means for moving said bolt back and forthand locking it in its extreme positions.

4. The combination of a guide casing having a recess extendinglongitudinally thereof, a bolt slidable in said casing and having arecess in one side thereof, and a notch in one wall of said recessregistering with the recess in said casing, a T-shaped operating memberarranged in the recess in said bolt with its stem projected through thenotch in the bolt and the recess in the casing, and having the outeredge of its head curved longitudinally, longitudinally-spaced studsprojecting from one face of said operating member, said casing havinglongitudinally-spaced slots inclined downwardly toward each other forengagement by said studs whereby said bolt may be moved longitudinallyback and forth and locked in its extreme positions.

5. The combination of a guide member having spaced slots inclineddownwardly toward each other and provided with communicating slots ornotches at the u per ends thereof, an operated member slidab e in saidguide member and having a recess in one side thereof, an operatingmember arranged in the recess of said operated member, and havinglongitudinally spaced studs extendin through said recess into the slotsin saic l guide member and a handle for moving said operating member,whereby said 0 erated member is moved back and forth, an one of 5 saidstuds being adapted to engage one of said notches and lock the operatedmember in its extreme position. In testimony whereof I have hereunto setmy hand in presence of two subscribing wit- 20 nesses.

JOHN MEIKLE.

Witnesses:

CHAS. S. LEPLEY, FRED STOUT.

